Gate valve



Nov.- 25, l1941.

J. J. DANIEL GATE VALVE Filed Sept. 25, 1939 2 Sheets-Sheet V1` Patented Nov. Z5, 1941 UNITED sTATEsPATENT vOFFICE;

GATElvALvE Joseph J. Daniel, Houston, Tex.` Application september 25, 1939, serial No. 296,345

1 Claim.

The invention relates to a valve ofthe type which has a swingable gate member arranged to be'clamped in closed position so as to maintain a seal.

i Itis one of the objects of the invention to provide a valve having a closure member which swings on an Aarc but'which can be clamped in and released while closed or open so that the member is free to be swung to either position.

Another object of the invention is to provide al single operating Vdevice for moving a valve member and locking it in closed position or in open position.

Another object of the invention is to provide an operating device which rst moves the valve member to closed position and thereafter operates a locking device to clamp the valve member in such closed position.

Other and further objects of the invention will be readily apparent when the following description is considered in connection with the accompanying drawings wherein:

Fig. 1 is a vertical sectional view showing the valve in closed but not locked position.

Fig. 2 is a transverse section taken through the locking mechanism as seen in Fig. 1.

Fig. 3 illustrates the device with the Valve member in open position but not yet locked.

Fig. 4 shows the valve member in closed and locked position and illustrates the arrangement of the locking mechanism.

In Fig. 1 the valve housing is indicated generally at 2 and has the base portion 3 connected to a pipe 4 whereas the cap portion 6 is connected to a pipe 1. The parts 3 and 6 are held together by bolts 8 and a seal ring 9 is clamped between them.

The base 3 is of a peculiar construction in that it has a chamber I0 therein which is arranged to `hold the valve member and its locking mechanism. 'Ihe valve member I2, as best seen in Fig. 4, is an arcuate member formed as a portion of a sphere. This member is slidable in the chamber I0 between the side guideways I4 and has an outer curved face I5 which is arranged to seat upon the seat ring I6. This gate member has a passage I1 therethrough which is arranged to move into alignment with the passage through the pipes 4 and 1, as best seen in Fig. 3. 'Ihis member is also arranged for swinging movement so that the imperforate portion I8 thereof moves over the opening to form a closure.

This valve member I2 is arranged to be turned by the arm 20. This arm 20 is best seen in Fig. 1

in section and is mounted upon the pivot pin 55 2| for turning movement. The arm has an opening 23 therein lwhich has a series of teeth 24 formed on the outer side of the opening and is arranged to receive the segment 25 for turning movement in the opening 23. This segment 2.5 is mounted upon the operating stem 26 to be turned by the hand wheel 21. When the teeth 30 on the segment 25 engage with the teeth 24 the arm 20 willbe caused to turn about the spindle 2| as a center. A lug 32 on the arm 420` is; arranged to engage in an opening 33 in the gate, member I2, as best seen in Fig. 4, so `that the gate mem. ber is compelled to turn with the arm 20.,

Particular attention is directed tothe fact that the segment 25 has the teeth 33 on only a portion thereof and the teeth are so arranged that after the last tooth has left the arm the arm will remain in that position while the segment 25 continues to turn. Thus as the segment 25 turns in a clockwise direction it will move the gate member to the maximum open position, as shown in Fig. 3, whereas when it is turned in a counterclockwise direction, as shown in Fig. 4, it will move the gate valve to the closed position.

When the gate member is moved to the closed position of Fig. 4 and the segment 25 continues to rotate it is arranged to engage a pinion 35 which is mounted for turning movement on the spindle 2|. This pinion 35 has 'a set of teeth 36 thereon which are arranged to engage the teeth 3l) on the segment. In this manner the continued rotation of the segment'25 after it leaves the teeth 24 causes the teeth 30 to engage the teeth 36 and in this manner the pinion 35 is turned. The pinion 35 carries a pin 38 which is eccentrically mounted thereon and this pin is arranged to engage in a slot 33 in the lever 4I), as best seen in Fig. 2. This lever 40 is of a bell crank configuration having the finger 4I thereon, as seen in Fig. 1. The heel 42 of the lever is mounted on a pivot pin 43, as best seen in Fig. 4, so that when the lever is oscillated by the turning of the pinion 35 the finger 4I is caused to oscillate in a similar manner.

A ring 45 is turnably mounted upon the shank 46 carried by the cap 6, the pin 43 being xed to this shank. The ring 45 carries the pins 44 so that the ring 45 is moved upon rocking of the linger 4 I.

Fig. 4 shows the locking device in the form of a shoe 48, which is mounted upon a skirt 49 on the shank 46. This shoe has a surface 50 which is arranged to engage the inner face of the gate member I2, as seen in Fig. 1. To negotiate the locking of the gate member this shoe 48 is moved to the left as seen in Fig. 1 to abut against the gate member. shifting of the shoe is accomplished by the pins 52, which are disposed in suitable recesses in the shoe 48 and in the ring 45. These pins are normally arranged at an angle, as seen at 53 in Fig. 1, so that relative turning movement between the ring 45 and the shank 45 will cause these pins to be moved to a position perpendicular to the ring 45. The adjustment screws 54 of Fig. 1 allow the locking device to be set for the proper clearance of the parts and to insure a proper pressure in clamping as well as to close the chamber I0.

This movement, of course, moves the ring -45 away from the shank 46 and causes a shifting movement of the shoe 48 to force it against the gate member I2. Opposite tilting movement of the lever 40 causes the pins 53 to move to an inclined position, removing the force applied to the shoe 48 and releasing the gate member l2. 'I'hus when the handle Y2! is turned the first movement, if the gate is in closed position, is to turn the pinion V35 to unlock the shoe 48 and then as .the turning of the teeth 3l) continues they will be released from the pinion 35 and engage the teeth 24 `of the arm 2.0, whereupon the arm 20 will move and carry with it the gate member until the open yposition of Fig. 3 is reached. Continued rotation moves the segment 25 out of the teeth 24 and into the pinion 35 to actuate the lockingo the gate in open position exactly the reverse of .the movement described in locking the gate in closed position.

This movement or When it is desired to close the valve the handle 21 is turned so `as to rotate the arm 20 and after the teeth 35 have passed out of the teeth 24 they next engage the pinion 35 so as to swing the arm 40, turn the ring 45, and lock the shoe 48 permanently in position.

In order to make the assembly readily adaptable to use a locking member 60 has been inserted into the housing 2 to serve the dual pur- -pose of holding the spindle 2| in place and prevent axial movement of the stem 26 by being engaged in a groove 62 in the stem.

Broadly the invention contemplates a construction wherein the gate member can be readily moved to open or closed position and securely locked in closed or open position.

What is claimed is:

A Valve comprising a housing, inlet and outlet openings therein, a tubular member extending within said housing from one of said openings, a seat about the other opening, a gate pivoted on an axis transverse to said tubular member, and movable to a closed position between said tubular member and said seat, a sealing member slidable on said tubular member, an operating member rotatably mounted in the housing and connected to said sealing member, an operating shaft in said housing, having a gear thereon engaging said gate Iand said operating member, and so formed that upon rotation of said shaft said gate is first moved to closed position and said sealing member is advanced on the tubular member to force said gate :against the seat.

JOSEPH J. DANIEL. 

